I have no issue believing you can measure sea levels at certain places. The question is, how do you mix all those measurements together to determine a global sea level number?
Afaik many things affect local measurements, like storms and tides.
For example, if you measure at three points in the US, and one point in Japan, how are the measurements weighted?
Suppose a storm is blowing in the US, increasing the measurements by 1m. How is it being accounted for?
Afaik many things affect local measurements, like storms and tides.
For example, if you measure at three points in the US, and one point in Japan, how are the measurements weighted?
Suppose a storm is blowing in the US, increasing the measurements by 1m. How is it being accounted for?